mISDN: Added layer-1-hold feature

Add IMHOLD_L1 ioctl.
The feature will be disabled on closing.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 49 insertions, 15 deletions

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 508945d1b9c1..530f68977361 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -292,7 +292,7 @@ static int
 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
 {
         struct mISDN_ctrl_req   cq;
-        int                     err = -EINVAL, val;
+        int                     err = -EINVAL, val[2];
         struct mISDNchannel     *bchan, *next;
 
         lock_sock(sk);
@@ -328,12 +328,27 @@ data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
                         err = -EINVAL;
                         break;
                 }
-                if (get_user(val, (int __user *)p)) {
+                val[0] = cmd;
+                if (get_user(val[1], (int __user *)p)) {
                         err = -EFAULT;
                         break;
                 }
                 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
-                    CONTROL_CHANNEL, &val);
+                    CONTROL_CHANNEL, val);
+                break;
+        case IMHOLD_L1:
+                if (sk->sk_protocol != ISDN_P_LAPD_NT
+                 && sk->sk_protocol != ISDN_P_LAPD_TE) {
+                        err = -EINVAL;
+                        break;
+                }
+                val[0] = cmd;
+                if (get_user(val[1], (int __user *)p)) {
+                        err = -EFAULT;
+                        break;
+                }
+                err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
+                    CONTROL_CHANNEL, val);
                 break;
         default:
                 err = -EINVAL;
diff --git a/drivers/isdn/mISDN/tei.c b/drivers/isdn/mISDN/tei.c
index b452dead8fd0..c75af762a067 100644
--- a/drivers/isdn/mISDN/tei.c
+++ b/drivers/isdn/mISDN/tei.c
@@ -122,8 +122,11 @@ da_deactivate(struct FsmInst *fi, int event, void *arg)
         }
         read_unlock_irqrestore(&mgr->lock, flags);
         /* All TEI are inactiv */
-        mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, NULL, 1);
-        mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING);
+        if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
+                mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
+                        NULL, 1);
+                mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING);
+        }
 }
 
 static void
@@ -132,9 +135,11 @@ da_ui(struct FsmInst *fi, int event, void *arg)
         struct manager  *mgr = fi->userdata;
 
         /* restart da timer */
-        mISDN_FsmDelTimer(&mgr->datimer, 2);
-        mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, NULL, 2);
-
+        if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
+                mISDN_FsmDelTimer(&mgr->datimer, 2);
+                mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
+                        NULL, 2);
+        }
 }
 
 static void
@@ -1103,6 +1108,7 @@ free_teimanager(struct manager *mgr)
 {
         struct layer2   *l2, *nl2;
 
+        test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
         if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
                 /* not locked lock is taken in release tei */
                 mgr->up = NULL;
@@ -1133,13 +1139,26 @@ static int
 ctrl_teimanager(struct manager *mgr, void *arg)
 {
         /* currently we only have one option */
-        int     clean = *((int *)arg);
-
-        if (clean)
-                test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options);
-        else
-                test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options);
-        return 0;
+        int     *val = (int *)arg;
+        int     ret = 0;
+
+        switch (val[0]) {
+        case IMCLEAR_L2:
+                if (val[1])
+                        test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options);
+                else
+                        test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options);
+                break;
+        case IMHOLD_L1:
+                if (val[1])
+                        test_and_set_bit(OPTION_L1_HOLD, &mgr->options);
+                else
+                        test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
+                break;
+        default:
+                ret = -EINVAL;
+        }
+        return ret;
 }
 
 /* This function does create a L2 for fixed TEI in NT Mode */